Andriyenko A. Main sort agrotechnics ways of different maturity groups of corn hybrids in northern Steppe of Ukraine

Object - Main sort agrotechnics ways of different maturity groups of corn hybrids- predecessor culture, the depth of the soil cultivation, dozes of fertilizers, terms of sowing, the density of plants. The purpose - is to develop main ways of new corn hybrids sort agrotechnic of difererent maturity groups and to recommend for production optimal parameters of their cultivation. Methods - field and laboratory-field experiences. Results: It has been established that the optimum corn hybrids sort agrotechnic tricks in-clude the application of deep soil cultivation, dozes of fertilizes N60P60 and predecessor culture winter wheat. The hybrid Kadr 195 CRF should be sown in the end of April (den-sity of plants 60 thousand/ha). The hybrids Kadr 267 SRF (50 thousand/ha), Dniprovsky 337 SRF (40 thousand/ha) and Kadr 443 CRF(30 thousand/ha) should be sown in the be-ginning of May. The most adopted biotypes for the growing by resource-saving technologies have been de-termined. In the case of applying shallow main tillage and the low optimal fertilizes doze it is necessary to sow early-maturing hybrid Kadr 195 CRF and middle-maturing hybrid Kadr 267 SRF. If predecessor culture is maize it is recommended to sow early-maturing hybrid Kadr 195 CRF and middle-late hybrid Kadr 443 CRF. Sphere of use – Agricultural.